Matching working

See "Migrated to SURF" in databaseConstruction
Minor modifications

To match databaseConstruction branch
Compiling and running but I can't get the fucking camera to work!
Trying to exclude bad labels
Added labels coloring and legend in object painting
Merge branch 'master' into understanding

Conflicts:
	dbg/keypoints_sample/Aragorn6.jpg
	dbg/keypoints_sample/Aragorn7.jpg
	dbg/keypoints_sample/Aragorn8.jpg
	dbg/keypoints_sample/Aragorn9.jpg
	dbg/keypoints_sample/box.jpg
	dbg/keypoints_sample/mail.png
	dbg/output_sample/Label0.jpg
	src/IStuff/database.cpp
	src/IStuff/object.cpp
	src/main.cpp